JP2555658Y2 - Shear device in extrusion press - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shearing device in an extrusion press for separating discard (or pressed cake) from a product extruded from a die.

[0002]

2. Description of the Related Art FIG. 6 is a front view of a conventional shear device. In a shear device 28 in a conventional extrusion press, a shear guide frame 90 is fixedly mounted on the upper side of an end platen via the bracket described above, and a shear cylinder 30 is disposed above the shear guide frame 90. . The shear cylinder 30 has its piston rod 30a
The shear guide frame 90 and the shear guide 9
A shear slide 48 that can be vertically and vertically stroked along 1 is fixedly provided. A shear blade 48a is attached to the lower side of the central portion of the shear slide 48. The knocker body 105 is disposed adjacent to the concave portion of the shear body 48 at a substantially central portion of the shear body 48 in a concave portion having a cross section along the axial direction of the shear body 48. , Can be vertically slid along the shear body 48.

On the other hand, a drilling hole is inserted in the axial direction of the shear slide 48, and a knocker device 100 is provided. The knocker device 100 includes a knocker cylinder 102 and a knocker body 105. A knocker cylinder 102 is fixed to an upper end portion of the shear slide 48. A knocker body 105 having a circular cross section is fixed to the lower end of the knocker rod 104 of the knocker cylinder 102 via the knocker rod 103. As shown in FIG. 4, a part of the knocker body 105 is slidably incorporated in the recess 48b of the shear body 48.

[0004]

However, in the shear device described above, since the shear cylinder 30 and the knocker cylinder 102 are arranged in series from above to below, the overall height of the shear device is large in a large extrusion press. And the ceiling of the factory where the extrusion press is installed becomes unnecessarily high. The purpose of this invention is
An object of the present invention is to provide an extrusion press that reduces the overall height of a shear device even when the size of the extrusion press device becomes large, focusing on the above conventional problems.

[0005]

In order to achieve the above object, a shear device of an extrusion press according to the present invention is provided with a groove having a concave cross section along an axial direction of a shear slide of the shear device in the extrusion press. A knocker device for separating the discard and the product by pushing the discard from a direction crossing the pushing direction is provided so as to be vertically movable integrally with the shear slide, and a shear cylinder for moving the shear slide up and down is provided by the knocker device. A pair of the knocker cylinders are vertically spaced apart from each other on both sides of the knocker cylinder.

[0006]

In the shearing device of the extrusion press according to the present invention, after the extrusion stem is advanced and the extrusion is completed, the container is retracted to cause the discard to protrude from the rear surface of the container. The discard is moved in the vertical direction from the direction crossing the extrusion direction to cut the discard with a shear blade, and at the same time, the discard is pushed away by a knocker device.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment will be described below with reference to FIGS. 1 is a plan view of an extrusion press device, FIG. 2 is a longitudinal sectional view of a main part showing a shear device of the extrusion press, and FIG.
FIG. 4 is a front view of FIG. 2, FIG. 4 is a longitudinal sectional view of a main part along the line IV-IV of FIG. 3, and FIG. 5 is a sectional view showing an extruded state of the billet.

An end platen 12 is fixedly mounted on one end of a machine base (not shown), a cylinder mounting block 14 is mounted on the other end, and an extruding cylinder 16 is fixedly mounted on the cylinder mounting block 14. End platen 12
The lower part on the side facing the extrusion cylinder 16 protrudes to form a die support part 20, on which a die slide 22 is slidably mounted in the machine width direction. A die 24 is held on the die slide 22.

The die slide 22 is provided with the end platen 12.
Is moved in the machine width direction by a cylinder 25 provided on the side of the machine. In addition, it is possible to reciprocate between an extrusion operation position located on the back surface of the end platen 12 (the surface on the side of the extrusion cylinder 16) and a die exchange position pulled out from the back surface of the end platen 12. End platen 12
A bracket 26 is fixedly provided on the upper side of the side facing the extrusion cylinder 16, and a shear device 28 is provided on the bracket 26. The shear device 28 is for cutting a discard 84 and a product portion 86 of the die 24, which will be described later, and includes a shear slide 48 having a shear blade 48a vertically stroked by a shear cylinder 30. I have.

The end platen 12 and the cylinder mounting block 14 are connected by a column 34. A container guide (not shown) is provided at a portion of the column 34 on the end platen 12 side, and a container 38 is installed movably in the pushing direction along the container guide. A container cylinder 40 is provided on the end platen 12 to move the container 38 in the pushing direction or the opposite direction. The tip of the piston rod 42 of the container cylinder 40 is connected to the container holder 38A.
The container holder 38A can be moved in the left-right direction in FIG. 5 by moving the container holder 2 forward and backward. The container 3 attached to the container holder 38A
8 has a billet loading hole 44 in which a container liner 46 is mounted.

A billet loader 52 is provided on the extrusion cylinder 16 side of the container 38. Billet loader 5
Numeral 2 can be retracted from the stem advance / retreat area by a driving device (not shown). The extrusion cylinder 16 is provided with a ram 58, and the main crosshead 5 is provided at the tip of the ram 58.
The stem 60 is mounted via the mounting member 6 and the mounting member 54. An oil reservoir tank (not shown) is provided above the cylinder 16, and the oil reservoir tank and the hydraulic oil inlet at the rear end of the extrusion cylinder 16 are connected by a prefill valve 66. The prefill valve 66 is provided with a butterfly valve. A valve for opening and closing the inlet is installed at the inlet (not shown). This valve is opened and closed by a cylinder 72. On the side of the extrusion cylinder 16, a side cylinder 76,
78, and their piston rods 80,
Reference numeral 82 is fixed to the main crosshead 56.

Next, the shear device 28 of the present invention will be described in detail. A shear guide frame 90 is fixedly provided above the end platen 12, and a shear cylinder 30 is disposed on both side surfaces of the shear guide frame 90. A shear slide 4 that can vertically and vertically stroke along the shear guide frame 90 and the shear slide retainer 91 at the tip of the piston rod 30a of the shear cylinder 30.
8 is fixed. A shear blade 48a is attached to the lower side of the central portion of the shear slide 48. A knocker body 105 is formed at a substantially central portion of the shear slide 48 in a concave portion 48b having a cross section along the axial direction of the shear slide 48, and the knocker body 105 is adjacent to the concave portion 48b of the shear slide 48. And can be slid up and down along the shear slide 48.

On the other hand, a drilling hole 101 is inserted in the axial direction of the shear slide 48, and a knocker device 100 is provided. The knocker device 100 includes a knocker cylinder 102
And a knocker body 105. A knocker cylinder 102 is fixed to an upper end portion of the shear slide 48 without the perforation hole 101. A knocker body 105 having a circular cross section is fixed to a lower end of the knocker rod 103 via a piston rod 104 of the knocker cylinder 102. As shown in FIG. 4, a part of the knocker body 105 is slidably adjoined in the recess 48b of the shear slide 48, so that the discard 84 adheres to the shear blade 48a even if the discard 84 is thin. 84 can be reliably removed. Reference numeral 87 indicates a dummy block.

The operation of the extrusion press configured as described above will be described with reference to FIG. First, during the extrusion of the previous cycle, the billet 85 for the next cycle is put into the billet loader 5.
It has risen in response to 2. Then, the ram 58 of the extrusion cylinder 16 is advanced to advance the extrusion stem 60, and the billet 85 is loaded into the billet loading hole 44 of the container 38.

When the ram 58 advances, the valve is opened,
The ram 58 is advanced by the side cylinders 76 and 78. As the ram 58 advances, a large amount of hydraulic oil flows from the oil reservoir tank into the extrusion cylinder 16 via the prefill valve 66. Next, the billet loader 52 is retracted from the position between the container 38 and the extrusion cylinder 16. The container 38 has been moved in advance so as to be in close contact (contact) with the die 24 by a container cylinder. After the loading of the billet 85 is completed, the ram 58 is further advanced, the container 38 and the ram 58 are temporarily retracted, the die 24 is opened, a burp cycle is performed, and the container 38 is advanced again. Let me die 24
And close contact. Next, the extrusion stem 60 is advanced, and the billet 85 is strongly pressed through the dummy block 87 to extrude the product 86 from the die 24.

When the billet 85 has been extruded to the limit, the advance of the extrusion stem 60 is stopped. Thereafter, the container 38 is slightly retracted so that the discard 84 remaining in the billet 85 shown in FIG. 1 projects from the container 38, and the extrusion stem 60 is retracted toward the extrusion cylinder 16 side.
At this time, the front end face of the discard 84 and the die 24
The rear end face is located vertically below the cutting edge of the shear slide 48. After a while, shear cylinder 3
0 is operated, the shear slide 48 is lowered, and the discard 84 and the product 86 are cut and separated. Occasionally, the shear blade 4 whose discard 84 heats up due to repeated cutting
8a. Therefore, by operating the knocker cylinder 102, the knocker body 105 is moved vertically downward, and the discard 84 is moved to the shear blade 48.
Remove from a. When the discard 84 and the product 86 are to be cut, an appropriate receiving member is arranged below the discard 84 and the discard 84 is cut off.
Try to catch it. In this embodiment, the shear device of the extrusion press has been described for the direct extrusion press, but the same effect can be obtained for the indirect extrusion press. In addition,
In this embodiment, the shear cylinder 30 is connected to the knocker cylinder 1.
Although a pair is provided on both sides separated from the reference numeral 02, the present invention is not limited to this.

[0017]

As is apparent from the above description, in the present invention, a groove having a concave cross section is arranged along the axial direction of the shear slide of the shear device in the extrusion press, and the discard is moved in the extrusion direction. A knocker device that pushes from the cross direction to separate the discard and the product is provided so as to be vertically movable integrally with the shear slide, and a shear cylinder that moves the shear slide up and down is a knocker cylinder that moves the knocker body of the knocker device up and down By disposing a pair on both sides of the extruder, the overall height of the shear device can be reduced even if the extrusion press becomes large,
Installation at existing factories is possible.

[Brief description of the drawings]

FIG. 1 is a plan view of a main part of an extrusion press device.

FIG. 2 is a longitudinal sectional view of a main part showing a shear device of an extrusion press.

FIG. 3 is a front view of a shear device of an extrusion press.

FIG. 4 is a longitudinal sectional view of an essential part taken along line IV-IV in FIG. 3;

FIG. 5 is a sectional view showing an extruded state of a billet.

FIG. 6 is a front view of a conventional shear device.

[Explanation of symbols]

 Reference Signs List 12 end platen 16 extrusion cylinder 24 die 26 shear guide frame 28 shear device 30 shear cylinder 38 container 38A container holder 46 container liner 48 shear slide 48a shear blade 48b concave portion 60 extrusion stem 84 discard 85 billet 86 product 90 shear guide frame 91 shear Slide holder 100 knocker device 102 knocker cylinder 105 knocker body

Claims (1)

(57) [Scope of request for utility model registration] 1. A knocker device for arranging a groove having a concave cross section along the axial direction of a shear slide of a shear device of an extrusion press, and pressing a discard from a direction crossing the extrusion direction to separate the discard from a product. Is provided so as to be vertically movable integrally with the shear slide, and a pair of shear cylinders for raising and lowering the shear slide are provided on both sides of the knocker cylinder for raising and lowering the knocker body of the knocker device. Device in the extrusion press.